Centroid
n. 质心\\n[机] 瞬心线
🗣️ 情景例句
Don't be lazy, the older you get, the harder it will be to learn.
别偷懒，年纪越大，学起来就越难。
This lady is a rent collector.
这位女士是收租人。
'I am a foreigner,' I said.
“我是个外国人，”我说。